Iran and five world powers agreed last week to extend by four months a deadline for reaching a final deal aimed at preventing Iran from acquiring a nuclear bomb. But a yawning gulf still has to be bridged.
Iran says it is enriching uranium for peaceful energy purposes only and wants the sanctions removed swiftly. But a history of hiding sensitive nuclear work from UN inspectors heightens international suspicions.
The parties to the Iran nuclear talks are likely to carry on marathon negotiations over the next two weeks. Each side is calling on the other to take the big steps necessary to make a comprehensive agreement possible.